On Mon, 14 Jul 2014, Tony Lindgren wrote:

* Paul Walmsley [off-list ref] [140714 10:32]:

quoted

On Mon, 7 Jul 2014, Tony Lindgren wrote:

quoted

With v3.16-rc4 the PM features for omap3 should be working
finally for device tree based booting. At lest beaglexm and
3xxevm should work.

Maybe you are using legacy booting path to idle the UARTs still?

FYI, I'm doing this to find the UART entries:

uarts=$(find /sys/class/tty/ttyO*/device/power/ -type d)
for uart in $uarts; do
        echo 3000 > $uart/autosuspend_delay_ms
done

uarts=$(find /sys/class/tty/ttyO*/power/ -type d)
for uart in $uarts; do
        echo enabled > $uart/wakeup
        echo auto > $uart/control
done

echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode

OK thanks, I'll take a close look at it.  It's not using the legacy paths, 
but based on a glance at the 37xxevm logs, it looks like the bus address 
of the UART isn't right.

Hmm for which UART? I'm using ttyO2 on my 37xxevm FYI, it can be selected
on the board based on some switch settings. I may have patched my u-boot
for that too but don't remember for sure.

Sorry, I should have been more specific.  The path name that the script 
here was using to write to the 'wakeup' file contained the base address.  
It's probably just best to set them via /sys/class/tty as you do.



- Paul